Geosynchronous satellites orbit the earth at a distance of 42 000 km from the earth's center. their angular speed at this height is the same as the rotation rate of the earth, so they appear stationary at certain locations in the sky. what is the force acting on a 1 500-kg satellite at this height?

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Orange juice has a lower or higher viscosity than chocolate syrup